Concrete-mixing apparatus



I. P. FABER.

CONCRETE MIXING APPARATUS.

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CONCRETE MIXING APPARATUS.

APPLICATION FILED APR.

Patented May 21T, IIQZII.

` 2 SHEETS-SHEET 2.

NETE@ STATES QTQHN I?. FABER, @F DUNELLEN, NEW TERSEY, ASSIGNOR T0 RANSOME CUN'CIPJEE MCHINERY COMPANY, A CORFORATXON OF'NEW YORK.

CONCRETE-MIXING- APFARATUS.

terasse.

Specification of Letters Patent.

Patented May 24, 1921.

application med .april 6,' i917. serial No. leones.

To all 'whom it may concern.'

Be it known that ll, JOHN F. FABER, a citizen ot the United States, and a resident or the borough of Dunellen, in the county of Middlesex, State ot New Jersey, have invented certain new and useful llmlprovements in Concre-Mix'ing llslpparaitus, of which the following is a specication.

rllhe improvements relate to machines for mixing concrete or the like, in which the aggregates are deposited in a rotary drum and mixed and commingled by the action of suitable .blades or other devices as the drum rotates. lin machines of this character it is common to have a charging opening in one head of the drum and a discharge opening in the other, and to have the blades so arranged-as to move the materials toward the discharge opening. This causes the materials to accumulate to a certain extent at the discharge end of the drum, and if the discharge opening is not pro-vided with a closure the capacity of the drum is greatly limited by the fact that it cannot be filled even to a point approaching the level ot the discharge opening, because the aggregates accumulating in this end of the drum will spill or be thrown outduring the mixing operation. llt has, therefore, been common practice for many years to pro-vide the discharge opening with a closure, and as the discharge opening must be effectively sealed by this closure, the arrangement should be such that the door rotates with the drum. A common form of door or closure is one in which it is mounted to rotate on a short shaft and the shaft in turn mountedfon a stationary part of the frame of the machine, or the door fixed to the shaft and the shaft mounted in suitable bearings in such frame, and in this construction the door is-opened and closed in the obvious Way by having a lever or the like mounted on the frame and adapted to engage the door or its shaft when moved in either direction, so as to,open and close the door. rlhere are a number of objections, however, to this construction, since it involves journal bearings exposed to the interference of the sp-lash of the mixture, and an extension of the frame of the machine over the discharge'l head of the drum, where any obstruction is undesirable; and these features are also expensive and more or less inconvenient.

'The present improvements are designed to overcome these objections and to provide a door of relatively simple construction, which is mounted on the drum itself and not on the stationary frame, and can be opened and closed without ditliculty, will pro-vide an eective seal and is not interfered with or rendered inoperative by the materials treated in the mixer. Other objects and advantages will appear to those skilled in the art from the following description and the accompanying drawings referred to therein:

ln the said drawings, Figure 1 is-a longitudinal vertical section of a mixer, door and accessories embodying the improvements. Fig. 2 is a Yvertical cross-section on the lineA2-2 of Fig. l'loolring in the direction indicated by the arrows, and with the parts behind the plane of the section in ele-V vation. Fig. 3 is a view similar to Fig. 1 showing the parts in the open position instead of in the closed position as in Fig. 1. Fig. 4 is an enlarged vertical cross-section on the line 44g ,of Figf looking in the direction indicated by the arrows in that igure.

'lhe rotary drum 1 may be provided with suitable blades such as those indicated at 2, secured internally therein' and constructed to direct the materials toward the discharge opening. Other blades 2a may be employed to act upon the materials between the charging opening and the blades 2. An 'arrangement of blades for this purpose is shown in United States Letters Patent, No. 1,247,148, of Nov.`20, 1917, to Arthur Vl/v.` Ransome. The opening 5 in the charging head 3 is larger than the opening 6 in the discharge head 4f, but the size and proportions of these openings may, of course, be varied to accommodate the mixer to' any particular purpose or meet conditions of use as desired. The drum may be mounted for rotation in any suitable manner, such, for example, as that shown in the said Patent No. 1,247,148.

The door 7 has a concave inner surface 8 and outwardly inclined periphery 9 adapted to *form a tight seal with the outwardly extending ange 10 of the discharge opening 6 when the door is closed. llt has a hub 11 The tube 12 passes through the drum on its horizontal axis andeXtends therefrom in both directions when the door is closed. It is therefore'onl necessary in order to open and close the oor to move this tube longitudinally by hand from one end of the drum or the other.

Automatic means for locking and unlocking the door are provided in the rod 14 extending through thetube 12, the latch member 15 mounted in the tube and mpving therewith, the inclined slot 16 and the pin 17. Convenient lmeans for moving the rod 14 and surrounding tube 12 are provided in the small hand-wheels' 18 and 19 loosely mounted on the ends of the bar.

Assuming that the door is in its closed position, as shown in Fig. 1 and it is desired to open it, the operator takes hold of one of the wheels 18 and 19 and pulls or pushes the bar 12 thereby to the left so as to withdraw the door. The first action resulting from the manipulation is to cause the bar 14 to move inside the tube 12, since the tube 12 is held against movement by the latch 15. This causes the pin 17, extending from side to side-of the rod 14 and through the recess 20 therein, to travel to the opposite end of the slot 16 and draw the latch or bolt 15 down below the edge of the hub 21. The pipe 12 now being free to move carries the door secured thereon outwardly until it is opened to a suflicient extent to permit the discharge of the contents. This moves the parts to the position shown in Fig. 3, where they will remain until it is desired to close the door again.

As all of the parts rotate with the drum it is desirable to have the wheels 18` and 19 loose on the rod 14, so that the rod will continue to rotate with the drum while the operator grasps the wheel and stopsl its rotation. The pipe 15 is supported near the discharge end of the drum by a spider 22 through a collar 23 in the center of which it passes, but another arrangement may be substituted for this. It will also be understood that the construction herein described and shown is merely an illustration of one embodiment of the present improvements which may be varied as to details of construction and arrangement to various condi tions of use or for other reasons.

The spider 24 is secured to the discharge head of the drum and, like the spider 22, consists of three arms extending outwardly and concentrically to the hub 21 through whichv the pipe 12 passes. By providing a set of three blades`or scoops within the drum to discharge the contents and having them arranged between the three arms of the spider the mixture discharge by each drum will pass between the said arms and fall on the discharge chute 25 without interruption. As the arms. however, are beveled or substantially triangular in cross-section (see Fig. 2) with the sharp edge toward the opening no serious interference with the discharge would be occasioned by them if they were in its path. It will also be apparent that the blades 2 discharge their load before reaching a point entirely above the tube 12, so that the materials passing therefrom do not strike the tube to any appreciable extent.

What I claim is:

1. The combination of a rotatable drum, provided with a discharge opening at one head, said discharge opening being at the axis of rotation, a door supporting member extending to said opening and a door mounted thereon, said supporting member being mounted on the drum, and means for moving the said supporting member and the door to and from the said discharge openingto open and close the same, the said door supporting member comprising a hollow member extending parallel with the axis of the drum and connected with the door, and a member movable with the same, and means for securing the door operable by the movement of said inner member.

2. The combination of a rotatable drum provided with a discharge opening in one head thereof, a frame secured to the said drum, a door, and means for moving the door to and from said opening, all of the said parts being mounted to rotate with the drum, said means for moving the door comprising a member mounted to move to and from the discharge opening and connected with the door, and another member movably connected therewith, and a handle rotatably mounted on the said second movable member.

3. The combination of a rotatable drum provided with a discharge opening in one head thereof, va frame secured to the said drum, a door, and means for moving the door to and from said opening, all of the said parts being mounted to rotate with the drum, said means for moving the door comprising a member mounted to move to and fromthe discharge opening and connected with the door, and another member movably connected therewith, and a latch normally projecting from one of said movable members and arranged to be retracted by the movement of the other member with respect thereto. V

4. The combination of arotatable drum provided with a discharge opening in one head thereof, a frame secured to the said drum, a door, and means for moving the door to and from said opening, all of the said parts being mounted to rotate with the drum, said means for moving the drum comprising a member slidably mounted on the drum, a second member movably connected therewith, a latch for holding the first member in door-closing position, and a connec- Lacasse 'tion between said latch and the second member, the construction and arrangement being such that relative movement of the second member with respect to the first causes retracting movementof the said latch.

5. The combination of a rotatable drum provided with an annular discharge opening incone head and at the axis thereof, a frame secured to the said drum, a door adapted to fit said opening and movable on said frame and means for axially moving the door to and from said discharge opening, all of the said parts being mounted to rotate with the drum, and'means for automatically locking the said door when the same is moved to closed position, said means also mounted to rotate with the drum.

6. The combination of a rotatable drum provided with a discharge opening `in one head and at the axis thereof and a charging opening in the other head thereof, a frame secured to the said drum, a door, and means for moving the door to and Jfrom said discharge opening, all of the said parts being mounted .to rotate with the drum, said door moving means extending through to the charging opening of the drum.

7. rlhe combination of a rotatable drum having a discharge opening in one head and at the axis thereof, a door fitted to said opening and adapted to open and close the same, door axially operating and locking means `mounted to rotate with the drum, and supporting means for such means also mounted to rotate with the drum.

8. The combination of a rotatable drum having a discharge opening in one head and at the axis thereof, a door fitted to said opening and adapted to open and close the Same, door axially operating and locking means mounted` to rotate with the drum, and supporting means for such means also mounted to rotate with the drum, and a handle movably connected with the door operating means.

9. The combination of a rotatable drum having a discharge opening in one head and at the axis thereof, a door fitted to said opening and adapted to open and close the same, door opening and closing and locking means mounted to rotate with the drum, and supporting means for such means also mounted to rotate with the drum, and a longitudinally movable handle connected with the door operating means, but rotatable therewith.

10. The combination of a rotatable drum, having a discharge opening in one head and at the axis thereof, a door fitted to said discharge opening, a door supporting member mounted on said drum and extending through the axis thereof a xed connection between said door and said supporting member, means for moving said door supporting member and door to open and close the latter, said means mounted on said door supporting member, and means mounted on the drum for mounting said door supporting member on the drum to rotate therewith, said means for moving the door supporting member being free from connection with any fixed part.

Witness my hand this 24th day of March, 1917, at the city of New York, in the county and State of New York.

JOHN i?. FABER 

